Appleton O-Z/Gedney™ 378849 ABC1101031011P Cast Iron Box for Flush Mounting cast junction boxes have been a staple of infrastructure construction for over 100 years. The O-Z/Gedney™ brand is a market leader, providing a broad selection of hot dip galvanized cast iron junction boxes in sizes ranging from 4” x 4” x 4” to 36” x 24” x 12”.